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Old 21st June 2017, 4:52 PM   #1
daehenoc Thread Starter
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Default Disk Utility won't Partition external firewire HDD

Hi,

I have recently got an old 500Gb firewire HDD to mess around with. What I want to use it for is setting up various partitions on it so that I can have Sierra, el Cap, whatever installed on each of their own partitions, and boot whichever OS X/macOS I need off the firewire drive. (Yes, this needs a mac with a firewire800 port)

Using Disk Utility, I can Erase the HDD and have one partition created, but the Partition button (or Partition from the right-click menu) is greyed out when I select the drive.

Am I missing something here, or is it a 'feature' of OS X/macOS that it won't create multiple partitions on an external Firewire drive? (The partition option is available if I select the internal HDD/SSD).

Any help or contribution gratefully accepted! Thanks!

Edit: I've tried with Firewire800 or USB connections to the external HDD, still can't Partition the external drive.
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Old 21st June 2017, 4:57 PM   #2
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FIXED; partition map wasn't GUID, was MS-DOS, <headdesk>. Erased HDD to GUID partition map, and woohoo, can do multiple partitions in Disk Utility. never mind...
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